Hoisting-machine.



- d I l aum J.G.F0GARTY'.

HOISTING MACHINE.

APPLICATION FILED MAR. 24, 1910.

, 1,021 402, I Patented Mar.26, 1912- 2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAFH CO-,WASHINOTON, D. C.

J. G. FOGARTY.

HOISTING MACHINE.

APPLICATION FILED MAR. 24. 1 910.

JOHN G. FOG-ARTY, 0F CARTI-IAGE, NEW YORK.

HOISTING-MACI-IINE.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed. March 24, 1910. Serial No. 551,318.

To all whom it may concern:

Be it known that I, JOHN G. FOGARTY, of Carthage, in the county of Jefferson and State of New York, have invented certain new and useful Improvements in Hoisting Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the'referencenumerals marked thereon.

The present invention relates to hoisting machines and more particularly to the type employed for excavating purposes. an object of the invention being to provide a construction in which the scoop or shovel members of a grab bucket may be actuated'to open or to close the bucketindependently of the raising and the lowering of the bucket, so that greater power may be obtained, especially in closing the bucket upon the material to be elevated, thus preventing the partial discharge of the bucket on each hoisting operation. Another object of the invention is to pro vide a construction which is adaptedto operate on a slope.

To these and other ends the invention consists in certain improvements and com-i binations of parts all as will be hereinafter more fully described, the novel features be-:

' ing pointed out in the claims at the end of the specification. 1 In the drawingsz'Figurel is a side view ofa hoisting machine embodying the pres-1 ent improvements, the bucket supporting arm being shown in longitudinal section;

' Fig. 2-is a top view of the bucket and the the bucket in open position and operating outer end of the bucket supporting arm; Fig. 3 is a front view of the bucket in closed position; Fig. 4. is a similar view showing upon a slope; Fig. 5 1s a transverse" section of the bucket supporting arm, and Fig. 6 is a detail sectional view of the swinging memher at the end of the arm supporting the scoop or shovel members. p

In the embodiment of the invention herein illustrated there is employed an upright post or mast 1 which preferably is mounted on the base 2 so as to rotate about a vertical axis, its upper end turning in the bearing member 3 supported -by one or more guy rods 4:; Carried by the mast l is a jib 5 oneend of which may be pivoted at 6 to the post and the other end of which is supported by a cable 7, the latter being employed for' raising and lowering the outer end of the jib and being controlled in any suitable manner.

The bucket instead of being supported by the jib 5, as usual, is preferably arranged at the outer end of a supporting arm, which in this instance is extensible, being formed of telescoping members 8 and 9, the latter receiving the former and being pivoted at 10 to the upright or post 1 below the jib 5, while the member 8 carries the bucket at its outer end. Preferably the member 9 is in the form of frame Work and carries rollers 11, which facilitate the movement of the member 8, this movement in this instance being controlled by a cable 12 which is secured at 13 to the inner end of the member arm with the jib 5, and leading downwardlyalong the latter to the upright 1' and any suitable controlling means. 7

The bucket preferably is mounted to swing about an axis extending transversely to the longitudinal axis of the supporting arm so that it may hang vertically when the arm is raised and lowered. To this end the latter is preferably extended downwardly and bifurcated to provide arms 16 between which is arranged a member 17 the latter in this instance being provided, on opposite sides with pivots 18 turning in bearing openings in the arm 16, and having screw threaded portions 19 receiving nuts 20, to hold the arms 16 against spreading.

The bucket comprises preferably two 00- operating scoop or shovel members 21 having blades 22 on their proximate sides and supported from the member 17 preferably by side pieces 23 which extend upwardly therefrom and turn on bearings 24: project- I ing from opposite sides of the member 17 so that the shovel members may swing relatively to each other about anaxis intersecting the axis about which the member 17 turns, and extending in the direction of the length of the supporting arm, thus permitting the bucket as a whole to swing in the direction of the lengthof the supporting arm, on an axis arranged transversely of the -length of the supporting arm, and the shovels individually to swing in a plane transverse of the length of the supporting arm.

The closing of the scoop or shovel members may be effected in any suitable manner. In this instance the cables or ropes 25 are each secured at 26 to one side of one of the bucket or scoop members 21, and then passed above a sheave or pulley 27 arranged on the same side of the other shovel or scoop member, thence to a pulley or sheave 28 on the shovel or scoop member to which it is secured. From the sheave 28 the cable passes upwardly over a sheave or pulley 29 on the frame 23, thence inwardly and upwardly to a swinging sheave 30 loosely supported on an eye 31 secured to the member 17 and from this sheave the cable or rope extends to the post or mast 1 and any suitable controlling means. As the cable leads. from the bucket at a point in proximity to the swinging axis of the latter the bucket may partake of its several movements without interfering with the closing ropes.

The opening means which forms one of the features of this invent-ion comprises preferably ropes or cables 32, each of which cooperates with the shovel or scooping members near their outer sides. To the end of supporting the opening cables or ropes so that they may act at this point and at the same time not be interfered with by the swinging movement of the bucket, there is provided above the scoop members and the supporting arm a guide member comprising preferably two spaced angle bars 33 rigidly secured together and supported from the scoop or shovel members by yoked links 34, the latter each being pivoted at 35 to the guide member and having their lower yoked portions pivoted at 36 to the frames 23 on opposite sides of the scoop members. Each opening cable 32 is secured at one end as at 37 to the guide member 33, is thence extended downwardly to a sheave 38 that is carried by the swinging member 39 on the outer end of the scoop member, thence upwardly to a pulley 40 on the guide member, along the latter to a pulley 41, and thence downwardly to a sheave 42, loosely supported by the eye 31. From the sheave 42 each rope or cable 32 passes to the mast or post 1 and any suitable controlling means. It will thus be seen that as the cables 32 lead from the bucket at points in proximity of the swinging axes of the latter, they are not affected by the swinging movement of the bucket, and those portions of the operating cables beyond the pulleys 42 are also not affected by the swinging of the bucket, as they partake of such swinging movement.

The operation of the machine will be apparent from the foregoing description, but it may be summarized as follows: The mast 1 may be rotated to swing the bucket supporting arm and the jib 5 to any position, it being in this instance limited. to an angle of substantially 180. The jib 5 is first set at a suitable height to permit the proper elevation of the bucket and the supporting arm is extended so that the material to be hoisted is within the field of operation of the bucket. The cable 15 is now let out to .lower the bucket while the latter is in a closed position, the bucket turning about the axis 18 with the lowering thereof. When the lower limit of the bucket is reached the scoop members are separated by drawing upon the cables or ropes 32. After the proper separation of the scoop members the latter are drawn together by the ropes or cables 26, thus closing the bucket prior to the elevation thereof, which is effected by the rope or cable 15 acting directly on the supporting arm and not on the bucket.

It will thus be seen that there has been provided a hoisting machine in which the entire power of the engine may be utilized for closing the bucket and the latter is entirely filled as it does not draw away from the work during the closing operation. The construction and mounting of the bucket is such that the latter may not only operate on level ground but may be used for excavating upon slopes or inclined surfaces.

I claim as my invention:

1. In a hoisting machine, the combination with a movable supporting arm, of a bucket mounted on the arm to swing bodily about an axis arranged at the extremity thereof, the bucket comprising scoop members movable relatively at the end of the arm about an axis extending longitudinally of the end of the arm, said axes being arranged in the same transverse plane, and means for moving the scoop members relatively.

2. In a hoisting machine, the combination with a movable supporting arm having a bifurcated outer end, of a member arranged between the arms of the bifurcation and having pivots turning in and extending through said arms, cooperating scoop members mounted to swing on the swinging member, closing cables connected to the scoop members, and sheaves loosely sup-- ported on the pivots of the swinging member and having the closing cables passing about them.

3. In a hoisting machine, the combination with a movable supporting arm, of a member mounted to swing thereon about an axis extending transversely of the length of the arm, a pair of cooperating and relatively swinging scoop members carried by the swinging member, a guide member, links supporting the guide member from the scoop members, opening cables connected to thescoop members and passing to the guide member, and sheaves supported in proximity to the axis of the swinging member and having the opening cables passing about them. i

4. In a hoisting machine, the combination with a movable sup-porting arm, of a membermounted to swing on said arm about an axis extending transversely of the length of the arm, a pair of cooperating scoop members pivoted to the first named member to swing about a common axis extending longitudinally of the arm, a guide member, links supporting the guide member from the scoop members and above the latter and the arm, opening cables leading from the scoop member to the guide member, and sheaves 7 arranged in proximity to the turning axis of the scoop members and having the opening cables passing about them.

5. In a hoisting machine, the combination with a movable supporting arm bifurcated at its outer end, of a swinging member arranged between the arms of the bifurcation and having pivots turning in and extending through said arms, scoop members turning relatively to each other on said swinging member about an axis intersecting the axis of the swinging member, a guide member, yoked links supporting the guide member from the scoop members above the latter and the supporting arm, pulleys on the guide member, sheaves loosely supported by .the pivots of the swinging members, and opening cables connected to the scoops and passing about the pulleys on the guide members to and about the sheaves.

6. In a hoistingvmachine, the combination with a movable supporting arm, of a bucket mounted on the arm to swing bodily about an axis arranged at the extremity thereof, the bucket comprising scoop members and supports fixedly connected to said scoop members, said supports having a movement about an axis extending longitudinally of the length of the arm, said axes being arranged in the same transverse plane, and means for moving the scoop members relatively.

JOHN Gr. FOGARTY.

Witnesses:

RUssELL B. GRIFFITH, HAROLD H. SIMMs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

\ Washington, D. G. 

